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Taiwan Semiconductor Corporation P4SMA24H
- Part No.:
- P4SMA24H
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
P4SMA24H.pdf
- Description:
- 400W, 24V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,441
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Product details
Overview
P4SMA24H from Taiwan Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in DC power rails and signal lines. It features a 21.6–26.4 V breakdown voltage (VBR), 19.4 V working stand-off voltage (VWM), 34.7 V clamping voltage (VC) at 12 A peak pulse current, 400 W peak pulse power rating (10/1000 µs), and <1 µA reverse leakage at VWM. It is widely deployed in automotive-grade DC/DC converters and industrial SMPS input stages.
For engineers reviewing the P4SMA24H datasheet, P4SMA24H pinout, P4SMA24H application, or P4SMA24H equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b transients, AEC-Q101 qualification status, DO-214AC (SMA) package compatibility with automated SMT placement, and thermal derating behavior up to +150 °C junction temperature.
Technical Context
The P4SMA24H operates as a unidirectional avalanche diode, leveraging glass-passivated junction technology to achieve fast transient response (<1.0 ps) and stable breakdown characteristics. Its clamping action begins at VBR (min 21.6 V) and limits surge energy to ≤34.7 V at 12 A (10/1000 µs), ensuring downstream ICs remain within safe operating voltage margins.
It complies with AEC-Q101 stress testing for automotive use and meets ISO 7637-2 immunity requirements for vehicle electrical systems. The device exhibits a temperature coefficient of VBR of +0.094 %/°C and maintains ≤1 µA IR at VWM, enabling low-power standby operation without excessive quiescent loss.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 21.6–26.4 V - defines minimum and maximum avalanche initiation voltage under standardized test conditions |
| VWM | 19.4 V - maximum continuous reverse voltage before significant leakage; sets system operating margin |
| VC @ IPPM = 12 A | 34.7 V - clamped voltage during 10/1000 µs surge; determines protected circuit's worst-case overvoltage exposure |
| PPPM | 400 W - peak pulse power handling capability; defines survivability against standardized automotive transients |
| IR @ VWM | <1 µA - ensures negligible standby current draw in battery-powered or low-power systems |
| Junction Temp Range | −55 to +150 °C - supports operation in under-hood automotive and industrial ambient environments |
| Package | DO-214AC (SMA) - industry-standard surface-mount outline compatible with J-STD-002 soldering and automated pick-and-place |
Pinout & Package
DO-214AC (SMA) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band, weight ≈ 0.060 g, UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 24 V rail); conducts surge current to ground when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
| Glass passivated junction | Ensures long-term reliability and stable VBR drift under thermal cycling and humidity exposure |
| Clamping voltage ≤34.7 V at 12 A | Provides tight overvoltage control for 24 V nominal systems, protecting downstream 36 V-rated regulators and controllers |
| ISO 7637-2 compliance | Guarantees immunity to common automotive load-dump and inductive-switching transients (Pulse 1, 2a, 2b, 3a, 3b) |
| Moisture sensitivity level 1 | Enables standard SMT reflow without baking or special handling per J-STD-020 |
Applications
| Automotive On-Board DC/DC Converter | Industrial Switching Mode Power Supply |
|---|---|
Use Scenario: Protecting primary-side 24 V input of isolated buck-boost DC/DC modules in engine control units and ADAS domain controllers. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals to clamp load-dump spikes (ISO 7637-2 Pulse 5a) and inductive switching transients. Use Value: Limits transient voltage to ≤34.7 V, preventing damage to upstream fuse boxes and downstream controller ICs rated for 36 V absolute maximum. |
Use Scenario: Input rail protection for 24 V industrial SMPS used in PLC I/O modules and motor drive auxiliary supplies. IC Role / Device Role / Timing Role: Standoff protection element on main DC input, activated only during surge events with sub-nanosecond response. Use Value: Maintains system uptime by absorbing 400 W surges without degradation, verified over >1000 cycles per JEDEC JESD22-A114. |
| LED Driver Power Input | Telecom Power Interface |
Use Scenario: Surge suppression on constant-current LED driver inputs in commercial lighting fixtures exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp on 24 V bus, coordinated with upstream MOVs for multi-stage protection. Use Value: Clamps to 34.7 V within <1.0 ps, preventing latch-up in LED driver ICs and preserving color consistency during grid disturbances. |
Use Scenario: Protection of 24 V telecom power interface cards receiving power from central office distribution panels. IC Role / Device Role / Timing Role: Fast-acting TVS on DC input to suppress induced surges from nearby AC wiring and relay switching noise. Use Value: Enables compliance with GR-1089-CORE Section 4.5.2 for conducted transients, with ≤1 µA leakage preserving low-noise bias integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ24A | Bidirectional variant; same VBR range (21.6–26.4 V), but symmetric clamping in both polarities; DO-214AA (SMB) package | Required where AC-coupled signals or reversible polarity connections exist; not suitable for unidirectional-only DC rails | Select SMBJ24A only if bidirectional protection is needed; otherwise P4SMA24H offers tighter VC and smaller SMA footprint |
| 1.5SMC24A | Higher 1500 W rating; larger DO-214AB (SMC) package; VC = 38.9 V at 38.8 A; higher thermal mass | Used in high-energy surge environments (e.g., outdoor telecom cabinets); requires PCB area increase and layout revision | Choose 1.5SMC24A only when 400 W is insufficient; P4SMA24H is optimal for space-constrained, cost-sensitive 24 V DC applications |
Compared with SMBJ24A and 1.5SMC24A, the P4SMA24H delivers best-in-class clamping voltage (34.7 V) and smallest footprint (DO-214AC) for unidirectional 24 V rail protection, while maintaining AEC-Q101 qualification and ISO 7637-2 compliance without design trade-offs.
Availability
P4SMA24H is available at Aetrix Electronics and suitable for automotive ECUs, industrial SMPS designs, and LED lighting systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for P4SMA24H includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global AEC-Q101 certification capabilities.
The P4SMA24H belongs to TSC's AEC-Q101-qualified P4SMAxH series, engineered specifically for automotive and industrial transient suppression where reliability, fast response, and compact packaging are critical.
FAQ
What is the clamping voltage of the P4SMA24H under standard surge conditions?
The P4SMA24H has a maximum clamping voltage (VC) of 34.7 V when subjected to a 10/1000 µs waveform with a peak impulse current (IPPM) of 12 A. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for 24 V nominal systems. The P4SMA24H maintains this clamping performance across its full operating temperature range (−55 to +150 °C).
Is the P4SMA24H suitable for automotive applications?
Yes, the P4SMA24H is AEC-Q101 qualified and meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b transients-making it suitable for automotive body control modules, infotainment power supplies, and ADAS sensor interfaces. Its DO-214AC package supports automated assembly, and its −55 to +150 °C junction temperature range accommodates under-hood environments. The P4SMA24H is explicitly listed in TSC's automotive-grade product portfolio.
What is the difference between P4SMA24H and P4SMA24AH?
The P4SMA24AH is the "A" variant with tighter VBR tolerance: 22.8–25.2 V versus 21.6–26.4 V for the P4SMA24H. Both share identical VWM (20.5 V vs. 19.4 V), VC (33.2 V vs. 34.7 V), and package (DO-214AC). The P4SMA24AH offers improved voltage consistency for precision-clamp designs, while the P4SMA24H provides broader margin for cost-sensitive applications. The P4SMA24H remains the standard version referenced in most automotive schematics.
Does the P4SMA24H have polarity marking, and how is it oriented on the PCB?
Yes, the P4SMA24H is unidirectional and marked with a cathode band (typically a white or black stripe) on the DO-214AC package body. During PCB layout, the cathode must connect to the protected line (e.g., 24 V rail), and the anode to ground or the lower-potential reference. Incorrect orientation prevents clamping action and may cause catastrophic failure under surge. The P4SMA24H's polarity marking aligns with JEDEC DO-214AC mechanical standards and is visible in TSC's official package drawings.
What is the maximum reverse leakage current for the P4SMA24H at its working voltage?
The P4SMA24H exhibits a maximum reverse leakage current (IR) of 1 µA when biased at its working stand-off voltage (VWM) of 19.4 V, measured at 25 °C. This ultra-low leakage ensures minimal power loss in always-on circuits and preserves battery life in automotive standby modes. The P4SMA24H maintains <5 µA leakage up to +125 °C, as confirmed in TSC's thermal characterization data.
P4SMA24H Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- P4SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 19.4V
- Voltage - Breakdown (Min):
- 21.6V
- Voltage - Clamping (Max) @ Ipp:
- 34.7V
- Current - Peak Pulse (10/1000µs):
- 12A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
P4SMA24H FAQ
1.How can I place an order for P4SMA24H through Aetrix?
Please submit a Request for Quotation (RFQ) for P4SMA24H on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for P4SMA24H reliable?
The price and inventory of P4SMA24H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for P4SMA24H is usually 5 days.
3.What payment methods are accepted for P4SMA24H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for P4SMA24H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for P4SMA24H?
P4SMA24H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your P4SMA24H order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for P4SMA24H?
For technical support, including P4SMA24H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your P4SMA24H requirements.
6.How does Aetrix verify that P4SMA24H is sourced from the original manufacturer or authorized distributors?
All P4SMA24H products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that P4SMA24H meets industry standards.
7.What is the process for return or replacement of P4SMA24H?
All P4SMA24H units undergo pre-shipment inspection (PSI). If there is an issue with P4SMA24H, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The P4SMA24H part is unused and in its original packaging.
Return procedure for P4SMA24H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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